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Atari Mega Archive 1
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Atari Mega Archive - Volume 1.iso
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st_rtty.lzh
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RTTY.DOC
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1987-04-21
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4KB
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87 lines
This is an amateur radio RTTY program for the Atari ST.
Capabilities:
1. BAUDOT (60, 75, & 100 WPM)
ASCII (110 & 300 Baud)
2. Variable size split Screen
Drag the MOVE bar on the transmit window to change size
Type ahead to transmit window during receive.
3. Write Sessions to disk
Received and transmitted characters are written to disk
in the order they occur on the air.
4. Read disk files into transmit buffer.
5. Desk accessory support.
NOTE--received characters are written to receive window
even while desk accessory is active. This works OK as
long as the desk accessory is running in a GEM window because
RTTY uses GEM to determine if its window is obscured by
another window. However, GEM forms (e.g. the standard file
selector form) are not windows and are not protected from
being overwritten on the screen by the RTTY program.
6. Limited line editing for transmitting.
(delete back to beginning of current line)
7. Drop down menus are used for all functions except:
F1 switches unconditionally and immediately to
receive mode, and sets RTS off.
F2 switches unconditionally and immediately to
transmit mode, sets RTS on, and starts
transmitting characters from the transmit
buffer. When there are none, it holds the
modem in the MARK state (no diddling).
F3 inserts a character in the transmit buffer
(displayed as a greek letter phi) that is
not transmitted, but switches back to receive
mode when it is reached. Any characters following
the F3 character remain in the transmit buffer
and will be sent when F2 is selected again.
F4 allows deletion of all characters in the transmit
buffer (after a confirmation). The deleted
characters remain in the transmit window in
the display, however.
NOTES:
RTTY.PRG and RTTY.RSC must reside in the same folder. The
program exits immediately if the resource file is missing.
The ASCII/Baudot conversion is from the 1982 ARRL Radio
Amateur's Handbook, the chapter on Specialized Communications
Systems. The FIGS code used is the US Figures (versus the
CCITT No 2 Figures). The Bell character (FIGS 5) does not
ring a bell, but prints a diamond character. When transmitting
Baudot, the conversion from ASCII is done as characters are
removed from the type ahead buffer. Characters that do not
translate into Baudot are simply discarded at that time, even
though they appear on the transmit half of the screen.
I use the NOTEPAD desk accessory from COMPUTE! April, 1987
Atari ST disk if I need a real text editor to compose for
transmission, which makes up somewhat for the limited
editing capability of the RTTY program itself. This is
the main purpose of the "SWITCH RECORDING..." menu entry.
It allows you to close the file currently being recorded,
open a new one for recording, and then NOTEPAD can open
the old one for inspection, or retransmitting text if you like.
I used Megamax C compiler and resource editor to develop
this program (but you don't need a C compiler to run it).
This program was written and tested on an Atari 1040ST
with single disk drive and monochrome monitor. My RTTY modem
is a Heathkit HD3030 and my rig is a Kenwood TS-440S.
I don't know whether this program will work on any other
hardware although I think it should. Specifically, the
color monitor could be a problem. I'd like to hear from anyone that
tries this program on a color monitor, as well as from anyone that
finds this program useful at all. Please send me a QSL at:
1805 Mayfield
Round Rock, Texas 78681